Basic Principle Distinguish flaws measuring the change of eddy currents occurred by the defaults of the test body’s surface, namely the change of test coil’s impedance. Detected target and application Detect the defects on the surface or around the surface of steel, nonferrous metallic pipes and wires. Measure the thickness of the thin film. Distinguish materials. Feature Non-contact excursion High speed excursion and automatic excursion are available. Its detective ability of a surface flaw is excellent. Detect the flaws of a heat exchanger tube.
Eddy current test(ECT)
Detecting any fault by measuring changes of impedance of the test coil, or changes with eddy current caused by the fault of surface layer of the test subject
Subject and application
Detecting any fault on the surface or layer close to the surface of steel, non-steel pipe or wire, or measuring thickness of thin film, material identification
Fast detection, automatic detection
Excellent surface error detection capability
Detection of error with heat exchanger tubes